c# ListView排序

来源：互联网发布：java中构造器的作用编辑：程序博客网时间：2024/05/17 10:53

ListViewColumnSorter.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;
using System.Windows.Forms;

namespace Microblue
{
    class ListViewColumnSorter : IComparer
    {
        /**/
        /// <summary>
        /// 指定按照哪个列排序
        /// </summary>
        private int ColumnToSort;
        /**/
        /// <summary>
        /// 指定排序的方式
        /// </summary>
        private SortOrder OrderOfSort;
        /**/
        /// <summary>
        /// 声明CaseInsensitiveComparer类对象，
        /// 参见ms-help://MS.VSCC.2003/MS.MSDNQTR.2003FEB.2052/cpref/html/frlrfSystemCollectionsCaseInsensitiveComparerClassTopic.htm
        /// </summary>
        private CaseInsensitiveComparer ObjectCompare;

        /**/
        /// <summary>
        /// 构造函数
        /// </summary>
        public ListViewColumnSorter()
        {
            // 默认按第一列排序
            ColumnToSort = 0;

// 排序方式为不排序
OrderOfSort = SortOrder.None;

            // 初始化CaseInsensitiveComparer类对象
            ObjectCompare = new CaseInsensitiveComparer();
        }

        /**/
        /// <summary>
        /// 重写IComparer接口.
        /// </summary>
        /// <param name="x">要比较的第一个对象</param>
        /// <param name="y">要比较的第二个对象</param>
        /// <returns>比较的结果.如果相等返回0，如果x大于y返回1，如果x小于y返回-1</returns>
        public int Compare(object x, object y)
        {
            int compareResult;
            ListViewItem listviewX, listviewY;

            // 将比较对象转换为ListViewItem对象
            listviewX = (ListViewItem)x;
            listviewY = (ListViewItem)y;

// 比较
compareResult = ObjectCompare.Compare(listviewX.SubItems[ColumnToSort].Text, listviewY.SubItems[ColumnToSort].Text);

            // 根据上面的比较结果返回正确的比较结果
            if (OrderOfSort == SortOrder.Ascending)
            {
                // 因为是正序排序，所以直接返回结果
                return compareResult;
            }
            else if (OrderOfSort == SortOrder.Descending)
            {
                // 如果是反序排序，所以要取负值再返回
                return (-compareResult);
            }
            else
            {
                // 如果相等返回0
                return 0;
            }
        }

        /**/
        /// <summary>
        /// 获取或设置按照哪一列排序.
        /// </summary>
        public int SortColumn
        {
            set
            {
                ColumnToSort = value;
            }
            get
            {
                return ColumnToSort;
            }
        }

        /**/
        /// <summary>
        /// 获取或设置排序方式.
        /// </summary>
        public SortOrder Order
        {

            set
            {
                OrderOfSort = value;
            }
            get
            {
                return OrderOfSort;
            }
        }
    }
}

调用顺序排序ListViewColumnSorter类1：

private ListViewColumnSorter lvwColumnSorter;

       //listView1事件
        private void listView1_ColumnClick(object sender, ColumnClickEventArgs e)
        {
            // 创建一个ListView排序类的对象，并设置listView1的排序器
            lvwColumnSorter = new ListViewColumnSorter();

this.listView1.ListViewItemSorter = lvwColumnSorter;

            if (e.Column == lvwColumnSorter.SortColumn)
            {
                // 重新设置此列的排序方法.
                if (lvwColumnSorter.Order == SortOrder.Ascending)
                {
                    listView1.Sorting = SortOrder.Descending;
                    lvwColumnSorter.Order = SortOrder.Descending;
                }
                else
                {
                    listView1.Sorting = SortOrder.Ascending;
                    //lvwColumnSorter.Order = SortOrder.Ascending;
                }
            }
            else
            {
                // 设置排序列，默认为正向排序
                lvwColumnSorter.SortColumn = e.Column;
                if (lvwColumnSorter.Order == SortOrder.Ascending)
                {
                    listView1.Sorting = SortOrder.Descending;
                    //lvwColumnSorter.Order = SortOrder.Descending;
                }
                else
                {
                    listView1.Sorting = SortOrder.Ascending;
                    //lvwColumnSorter.Order = SortOrder.Ascending;
                }
                //lvwColumnSorter.Order = SortOrder.Ascending;
            }

// 用新的排序方法对ListView排序
//this.listView1.Sort();

}

调用逆序和顺序排序ListViewColumnSorter类2：

private ListViewColumnSorter lvwColumnSorter;
private bool sort = false;

   private void listView1_ColumnClick(object sender, ColumnClickEventArgs e)
        {
            // 创建一个ListView排序类的对象，并设置listView1的排序器
            lvwColumnSorter = new ListViewColumnSorter();

                    if (sort == false)
            {
                sort = true;
                lvwColumnSorter.Order = SortOrder.Descending;
            }
            else
            {
                sort = false;
                lvwColumnSorter.Order = SortOrder.Ascending;
            }
            lvwColumnSorter.SortColumn = e.Column;
            this.listView1.ListViewItemSorter = lvwColumnSorter;

// 用新的排序方法对ListView排序
//this.listView1.Sort();

}